The phrase "than okay" is an idiom that means something is better than just satisfactory or adequate. It implies a higher level of quality, excellence, or superiority compared to simply meeting a standard or fulfilling a requirement.
Sentences with «than okay»
And apparently more than okay with my teenage son as well as my handsome husband, as every time I make this dish I get four thumbs up. (healthylivinghowto.com)
I'm more than okay with who I am and who I have become today as a man, and I'm just moving on with my life, man, doing this music. (businessinsider.com)
I respond that I was hoping to do a little better than okay in the greatest responsibility I had. (attachmentparenting.org)